body {
    background-color: #f8f9fa;
    min-height: 100vh;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,.05);
    height: 100%;
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    color: #333;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.form-label {
    font-weight: 500;
    color: #555;
}

.form-control {
    border-radius: 5px;
    padding: 10px 15px;
}

.form-control:focus {
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,.25);
}

.btn-primary {
    padding: 10px 20px;
    font-weight: 500;
}

.nav-link {
    padding: 0.5rem 1rem;
}

.nav-link.active {
    background-color: rgba(255,255,255,.1);
    border-radius: 5px;
}

.dropdown-menu {
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.dropdown-item {
    padding: 0.5rem 1.5rem;
}

.dropdown-item:hover {
    background-color: #f8f9fa;
}

.alert {
    border-radius: 5px;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.alert-success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.alert-error {
    color: #721c24;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

#qrCode {
    margin: 1rem 0;
    text-align: center;
}

#qrCode img {
    margin: 0 auto;
    display: block;
}
